Caretaker manager Andy King said he was hardly the best person to give advice to the incoming manager at Sixfields where the pressure increased after Northampton Town slipped to a third straight home defeat.

Gary Roberts and substitute Armand Gnanduillet hit the second half goals as promotion-chasing Chesterfield came from behind to beat the Cobblers at Sixfields to leave King's side six points adrift.

Darren Carter gave the basement boys the first-half lead from the penalty spot after goalkeeper Thomas Lee hauled down Hallam Hope. But Chesterfield equalised through Dan Gardner before the break and after the restart Roberts notched his seventh league of the season before Gnanduillet added a third late on.

King said: "I've enjoyed being in charge for the short time I have and I wish the new man all the best when he takes over and I understand that will happen on Monday.

"I'm not in a position to give advice to the incoming manager after losing again, except they need to go on an unbeaten run if they are to get out of trouble.

"I know that this squad is good enough to get out of this position but the only way confidence will improve is if they going on a bit of a run, over four or five games."

Looking back on Saturday's third defeat which left Cobblers rooted to the bottom of the table, King added:

"Any game you lose is disappointing but even more so with the position we are in. We got ourselves in front but then let them back into it with a schoolboy error.

"I told the players at half time that I felt some of them weren't doing it for us but there still wasn't much to choose between the two sides. Chesterfield only looked ocassionally like a side in second place and we did very well against them at times.

"I asked the referee about the penalty and should their keeper have been sent off? But he said our player was going away from goal so he didn't see it as a sending off offence. It's just one of those things that happen when you are struggling, they happen when you're in this position."

Chesterfield manager Paul Cook admitted his side were not at their best but is already looking ahead to Tuesday's game at York.

He said: "We have to win games to get promoted and we now have 19 big games, it's all about Tuesday night at York for us now. The fans have great belief in the team and I've told the players we have to repay that faith.

"We maybe had a bit of a hangover from Tuesday night and it was disappointing to go behind early to the penalty but you can never afford to feel sorry for yourself.

"You have to make results and you have to work to get them. Northampton never lied down and accepted it and that made it a big three points for us.

"We've made bad decisions in games and we had some luck in this game but if you work hard then you tend to find you get the little breaks in matches."